Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York

Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

I caught several wild and colorful 8-9 inch brook trout in the clear little pool below this waterfall.

From Mystery Creek # 89 in New York

Stream photos

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Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington

This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.

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27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.

Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Caddisfly Species Rhyacophila angelita (Green Sedges)

Where & when

Time of year : September and October

This transcontinental species, like Rhithrogena brunnea, is far more abundant in the West than elsewhere.

In 48 records from GBIF, adults of this species have mostly been collected during August (44%), September (17%), October (13%), July (8%), June (8%), and May (6%).

In 41 records from GBIF, this species has been collected at elevations ranging from 10 to 10466 ft, with an average (median) of 8022 ft.

Species Range

source

Map of specific collection sites

Egg-Laying behavior

Time of day: Evening

Larva & pupa biology

Current speed: Fast

Environmental tolerance: Prefers clear water

Start a Discussion of Rhyacophila angelita

References

LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.